Mark R. Witkowski
Chief Executive Officer at Core & Main Inc.
Sits on 1 board. Last updated September 28, 2026
Time on boards
- Boards served
- 1
- Current seats
- 1
- Board service
- 2 years
- Director since
- 2025
2 years of board service in total across 1 board, counting each seat separately. Longest: Core & Main Inc., 1 year.
Chief executive roles
Shareholder support
Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.
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Core & Main Inc. June 24, 202598.2%
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
| Date | Company | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Oct 16, 2026 | Core & Main Inc. | Gift | −19,596 | — | — |
| Mar 12, 2026 | Core & Main Inc. | Grant or award | +18,372 | — | — |
| Mar 11, 2026 | Core & Main Inc. | Shares withheld for tax | −1,685 | $49.16 | $82,835 |
| Mar 10, 2026 | Core & Main Inc. | Shares withheld for tax | −937 | $49.38 | $46,269 |
| Mar 9, 2026 | Core & Main Inc. | Shares withheld for tax | −478 | $49.96 | $23,881 |
| Aug 18, 2025 | Core & Main Inc. | Derivative conversion | +100,000 | — | — |
| Aug 18, 2025 | Core & Main Inc. | Open-market sale | −100,000 | $64.08 | $6,408,000 |
| Jul 17, 2025 | Core & Main Inc. | Derivative conversion | +100,000 | — | — |
| Jul 17, 2025 | Core & Main Inc. | Open-market sale | −72,331 | $61.12 | $4,420,871 |
| Jul 17, 2025 | Core & Main Inc. | Open-market sale | −27,669 | $61.63 | $1,705,240 |
| Mar 31, 2025 | Core & Main Inc. | Grant or award | +10,092 | — | — |
Questions about Mark R. Witkowski
What boards is Mark R. Witkowski on?
Mark R. Witkowski sits on the board of Core & Main Inc.
What company is Mark R. Witkowski the CEO of?
Mark R. Witkowski is Chief Executive Officer of Core & Main Inc.
How long has Mark R. Witkowski served on boards?
Our records show at least 2 years of board service across 1 board, the earliest from 2025.
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